• Environmental Analysis Health and Toxicology
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• 제16권4호
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• pp.161-170
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• 2001

In aqueous ecosystems, the level of toxicity is highly responsive dependant to multiple variables, including rainfall, sunlight, pH, adhesion, etc. Because Korea has particularly distinct wet and dry seasons, the toxicity of pollutants in rivers or streams is dependant on the sampling season and time. In order to examine the effects of rainfall on toxicity, sediment samples were collected from five sites along the Keumho river. It was found that Microtox toxicity levels were generally higher during the dry season than the wet season. It indicated that river pollutants are carried off more quickly by the water during the wet season. As a result, it was recommended that the point sources of pollutants of the Keumho river would be placed between KH3 (Paldalgyo) and KH4(Keumhogyo), KH4(Keumhogyo) and KH5(Dasa).

• 대한전기학회:학술대회논문집
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• 대한전기학회 2005년도 제36회 하계학술대회 논문집 D
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• pp.3019-3021
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• 2005

In this paper we suggest a novel temperature detection method utilized in direct over-temperature protection circuit modeling. The suggested model detects temperature variation using Rds(on) characteristics of MOSFET, while the conventional methods are using extra devices such as a temperature sensor or an over-temperature detection transistor. The temperature-dependant MOSFET model is implemented using Spice ABM(Spice Analog Behavior Model). The direct over-temperature protection circuit was designed including it. We verified effectiveness of the temperature dependant Rds(on) model characteristics and performance of the direct over-temperature protection circuit on PSpice simulation

• KSBB Journal
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• 제29권3호
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• pp.199-204
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• 2014

To investigate the effect of Plantago asiatica L. Root extract on skin care, we measured anti-oxidant activity and whitening action. As a result of measuring DPPH radical scavenging activity to examine independent anti-oxidation of PRE, there was slight scavenging activity. Fluorescent materials DHE, DCF-DA and DHR were each used to measure superoxide anion, hydrogen peroxide, and hydroperoxide created in RAW 264.7 cells, all concentrations were found to dependently prevent ROS production. Tyrosinase activation was found to be blocked dose-dependant. Melanin production was also prevented dose-dependant, but the effects were slight. Therefore, it is expected to be used effectively in development of functional cosmetic materials.

• Journal of Yeungnam Medical Science
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• 제1권1호
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• pp.129-134
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• 1984

저자들은 $1{\frac{1}{2}}$개월된 남아에서 vitamin K 의존인자 결핍으로 인한 뇌출혈 3주일후, 뇌혈관 기형에서 재차 출혈하여, 조직화한 팽창성 자발성 뇌실질내 혈종을 야기시킨 1예를 경험하고 문헌고찰과 함께 보고하는 바이다.

• 한국전산구조공학회:학술대회논문집
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• 한국전산구조공학회 2006년도 정기 학술대회 논문집
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• pp.891-897
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• 2006

The volume control method which utilize a pressure node added into a finite shell element can overcome the drawbacks of conventional load control method and displacement control method. In this study, an improved volume control method is introduced for effective analysis of path-dependant behaviors of RC structures subjected to cyclic loading. RC shell structures including RC hollow columns are anlayized by discretizing the structures with layered shell elements and by applying in-plane two dimensional constitutive equations for concrete layers and reinforcement layers of the shell elements. The so-called path dependant volume control method is verified by comparing analysis results with other data including experimental results.

• 전기학회논문지
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• 제61권3호
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• pp.367-372
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• 2012

In nuclear plants, UVR (under voltage relay, 27r) of 1E bus, which protected and supplied power to essential loads, to safety trip of reactor and supplied to starting signal of EDG (emergency diesel generators) automatically. therefore UVR tolerances setting and calculation method has been important to nuclear facility. If calculation and tolerances values differ or ignore, may induced power loss and economical loss by protective failure. This paper show results for calculation methods, and whether dependant or independent methods for factors. included whether PT (potential transformer/voltage transformer) tolerance or not adapted, and based on UVR setting method within a difference minimum and maximum of rated voltage to safety operation in nuclear plants.

• 한국소음진동공학회:학술대회논문집
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• 한국소음진동공학회 2003년도 추계학술대회논문집
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• pp.246-251
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• 2003

This paper presents an experimental study on the energy dissipation characteristics of viscous damping wall (VDW). VDW is consisted of a plate floating in a thin case made of steel plated filled with highly viscous silicone oil. Because VDW demonstrates both viscous damping and stiffness characteristics, the viscous resisting force can be expressed as the sum of velocity dependant viscous damping force and displacement dependant restoring force. The viscous resisting force and energy absorbing capacity can be easily adjusted by changing three factors, i.e. viscosity of the fluid, gap distance and area of the wall plates. VDW was tested using a series of harmonic (sinusoidal) displacement history having different frequency and amplitude and the force-displacement relationship was recorded. The relationship between dissipated energy with three factors and the influence of exciting frequency on resisting force were Investigated

• 한국축산식품학회지
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• 제18권2호
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• pp.149-156
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• 1998

Chicken beef pork meats and isolated soy protein (ISP) were heated at 10$0^{\circ}C$ for 30min and then heat-resistant proteins were fractionated to examine cross-resistant protein from chicken meat but not with beef pork or ISP. Dot blotting using the polyclonal antibody showed that the sen-sitivity for detecting chicken meat was 1$\mu$m and antibody-antigen reaction was dose-dependant. Results of dot blotting analysis to compare the amount of chicken meat present in arket meat products(Kentucky Frank sausage;chicken meat 46.52% and pork 24.92% vs Bulgogi Ham;chicken meat 28.89% and turkey 31.44%)showed that the significant differences between two meat products in terms of chicken meat concentrations. Dose-dependant dot-blotting reaction was also observed in chicken meat samples with various dilution.

• KSBB Journal
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• 제31권1호
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• pp.14-19
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• 2016

To investigate the effect of peanut sprout extract on skin care, we measured anti-oxidant activity and whitening action. As a result of measuring DPPH radical scavenging activity to examine independent anti-oxidation of peanut sprout extract, there was strongly scavenging activity. Fluorescent material DCF-DA was used to measure hydrogen peroxide created in RAW 264.7 cells, and all concentration dependently decreased ROS production. As a result of measuring nitric oxide to examine anti-inflammation of peanut sprout extract, there was strongly inhibited nitric oxide production in RAW 264.7 cells. Tyrosinase activation was found to inhibited dose-dependant. Melanin production was also prevented dose-dependant. Therefore, it is expected to be used effectively in development of functional cosmetic materials.

• 한국초지학회:학술대회논문집
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• 한국초지조사료학회 2003년도 제28회 정기총회, 제41회 학술발표회.심포지엄
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• pp.67-101
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• 2003